What’s the inverse function of a(b)=12•b+9/2

Suppose i flip two identical coins. what is the probability that i get one head and one tail?

An appliance store sells lamps at $95.00 for two. a department store sells similar lamps at 5 for $250.00. which store sells at a better rate

Simplify -4z+2y-y+-18z a.-22z+y b.-14z+2 c.3y+22z d.y +14z